My sandwich box lives on top of the toaster. A few months ago on returning from work I put it on top of the toaster which was on, and consequently melted the box.Tonight, feeling peckish, I went to the kitchen, cut some bread, lifted my new sandwich box off the toaster and then put the bread in to toast. I then put my sandwich box back on top of the toaster!Fortunately I realised my error within a few seconds and before things started to melt!